100% VISA® System 3 POLYESTERPerformance Polyester pants are by far the easiest to care for. Machine wash, dry, and wear. Not only does this amazing fabric retain its resilience, staying bright wash after wash, but “breathes” to give year ‘round comfort. VISA® System 3™ is permanent and won’t wash out. It’s designed to wick away moisture and accelerate soil release when washing.